// 实现这个项目的构建任务
const { src, dest, parallel, series, watch } = require('gulp');

const del = require('del');
const browserSync = require('browser-sync');

const loadPlugins = require('gulp-load-plugins');

const plugins = loadPlugins();
const bs = browserSync.create();

const data = {
    menus: [
        {
            name: 'Home',
            icon: 'aperture',
            link: 'index.html',
        },
        {
            name: 'Features',
            link: 'features.html',
        },
        {
            name: 'About',
            link: 'about.html',
        },
        {
            name: 'Contact',
            link: '#',
            children: [
                {
                    name: 'Twitter',
                    link: 'https://twitter.com/w_zce',
                },
                {
                    name: 'About',
                    link: 'https://weibo.com/zceme',
                },
                {
                    name: 'divider',
                },
                {
                    name: 'About',
                    link: 'https://github.com/zce',
                },
            ],
        },
    ],
    pkg: require('./package.json'),
    date: new Date(),
};

const clean = () => {
    return del(['dist', 'temp']);
};

const style = () => {
    return src('src/assets/styles/*.scss', { base: 'src' })
        .pipe(plugins.sass({ outputStyle: 'expanded' }))
        .pipe(dest('temp'))
        .pipe(bs.reload({ stream: true }));
};

const script = () => {
    return src('src/assets/scripts/*.js', { base: 'src' })
        .pipe(plugins.babel({ presets: ['@babel/preset-env'] }))
        .pipe(dest('temp'))
        .pipe(bs.reload({ stream: true }));
};

const page = () => {
    return src('src/*.html', { base: 'src' })
        .pipe(plugins.swig({ data, defaults: { cache: false } }))
        .pipe(dest('temp'))
        .pipe(bs.reload({ stream: true }));
};

const image = () => {
    return src('src/assets/images/**', { base: 'src' })
        .pipe(plugins.imagemin())
        .pipe(dest('dist'));
};

const font = () => {
    return src('src/assets/fonts/**', { base: 'src' })
        .pipe(plugins.imagemin())
        .pipe(dest('dist'));
};

const extra = () => {
    return src('public/**', { base: 'public' }).pipe(dest('dist'));
};

const serve = () => {
    watch('src/assets/styles/*.scss', style);
    watch('src/assets/scripts/*.js', script);
    watch('src/*.html', page);
    watch(
        ['src/assets/images/**', 'src/assets/fonts/**', 'public/**'],
        bs.reload
    );

    bs.init({
        notify: false,
        port: 2080,
        // open: false,
        // files: 'dist/**',
        server: {
            baseDir: ['temp', 'src', 'public'],
            routes: {
                '/node_modules': 'node_modules',
            },
        },
    });
};

const useref = () => {
    return (
        src('temp/*.html', { base: 'temp' })
            .pipe(plugins.useref({ searchPath: ['temp', '.'] }))
            // html js css
            .pipe(plugins.if(/\.js$/, plugins.uglify()))
            .pipe(plugins.if(/\.css$/, plugins.cleanCss()))
            .pipe(
                plugins.if(
                    /\.html$/,
                    plugins.htmlmin({
                        collapseWhitespace: true,
                        minifyCSS: true,
                        minifyJS: true,
                    })
                )
            )
            .pipe(dest('dist'))
    );
};

const lint = () => {
    return src('src/assets/scripts/*.js').pipe(plugins.eslint());
};

const compile = parallel(style, script, page);

const build = series(
    clean,
    parallel(lint, series(compile, useref), image, font, extra)
);

const start = series(lint, compile, serve);

module.exports = {
    clean,
    serve,
    build,
    start,
    lint,
};
